How to integrate oracle-ASP.NET + eagel website with PHP + MySQL website?

The company has two local area network websites. We plan to integrate these websites. Please give us some advice. Website A: The CMS portal website of the Empire. It uses the PHP + MySQL database and provides news, music and video playback, file download, and comment functions. Website B: OA collaborative office system, using ASP. NET + Oracle database,... the company has two LAN websites. Now we plan to integrate them. Ask the experts for advice.

Website A: The CMS portal website of the Empire. It uses the PHP + MySQL database and provides news, music and video playback, file download, and comment functions.
Website B: OA collaborative office system, using ASP. NET + Oracle database, compiled with Microsoft Visual Studio, has similar chat tools, leaders and subordinate file approval, departments to read files, text and news publishing and comment functions.
Website A is A secondary development of the CMS of the Empire. Website B is bought by leaders from other companies.

Now all the computers in the company's Lan are logged on to use the OA chat tool provided by website B. Therefore, website B can identify the visitor and no longer need to log on when posting news and comments.
In the future, we will always use the OA system of website B. It is very convenient to post comments and lead approval news. However, the column B of the website is simple and only supports text and text news. Now, I want to include the column A of website A, mainly for audio and video playback, file download, and front-end interface.

Ask:
(1) If the visitor recognition function of website B is retained to facilitate comments, can PHP only implement the ASP. NET Framework?
(2) Can the MySQL database content be imported into the Oracle database?
(3) How should these two websites be integrated? How long does it take for a person to do this? Website B can continue to seek help from that company to add features. Website A and the front-end interface are my own.

Thank you!

Reply content:

The company has two local area network websites. We plan to integrate these websites. Please give us some advice.

Website A: The CMS portal website of the Empire. It uses the PHP + MySQL database and provides news, music and video playback, file download, and comment functions.
Website B: OA collaborative office system, using ASP. NET + Oracle database, compiled with Microsoft Visual Studio, has similar chat tools, leaders and subordinate file approval, departments to read files, text and news publishing and comment functions.
Website A is A secondary development of the CMS of the Empire. Website B is bought by leaders from other companies.

Now all the computers in the company's Lan are logged on to use the OA chat tool provided by website B. Therefore, website B can identify the visitor and no longer need to log on when posting news and comments.
In the future, we will always use the OA system of website B. It is very convenient to post comments and lead approval news. However, the column B of the website is simple and only supports text and text news. Now, I want to include the column A of website A, mainly for audio and video playback, file download, and front-end interface.

Ask:
(1) If the visitor recognition function of website B is retained to facilitate comments, can PHP only implement the ASP. NET Framework?
(2) Can the MySQL database content be imported into the Oracle database?
(3) How should these two websites be integrated? How long does it take for a person to do this? Website B can continue to seek help from that company to add features. Website A and the front-end interface are my own.

Thank you!

1. Just log on to the system.
2. Yes. You can use navicat premium, but only tables. Views, stored procedures and functions do not work
3. Refer to 1